Shanghai Young Magnet Co. Ltd.: Your Professional Lifting Magnets Supplier！
Shanghai Young Magnet Co. Ltd.has an excellent reputation as China’s best magnet purchasing agent with over 20 years of industry experience. We provide one-stop purchasing services, without you having to worry about payment, negotiation, quality inspection, consolidation, shipment and other links.
Rich Experiences
Founded in 2001, our growing R&D team currently consists of 20 technical engineers dedicated to providing proactive and forward-thinking support to our customers, leading product development and innovation to better serve the current market. Our main markets include America, Europe, Middle East, Korea, Japan, Hong Kong, Taiwan and China. The company’s cooperative customers include Audi, LG, Samsung, Panasonic, Hitachi, etc.
Strong Production Capability
Based in Shanghai, we integrate research, development, production, and sales of new materials. Our annual output includes 800 tons of NdFeB magnets and 6000 tons of ferrite magnets, along with Alnico, SmCo, and plastic rubber magnets.
Complete Qualifications
We specialize in Permanent Sintered Neodymium-Ferrum-Boron (NdFeB) magnets, Samarium-Cobalt (SmCo) magnets, Aluminum-Nickel-Cobalt (AlNiCo) magnets, and related assemblies, all ISO9001 and SGS certified.
After-Sales Services
We provide comprehensive after-sales support, including troubleshooting, repair services, and customer assistance, ensuring satisfaction even after purchase.
Brief Introduction to Lifting Magnets
Lifting magnets are permanent magnets designed to produce a strong magnetic field for use in several industries where large, heavy ferrous objects need to be lifted. Lifting magnets consist of a block with a body and a rotor, each containing two magnets. When these two magnets are in the same orientation, they will produce magnetic flux to lift the ferrous object, and when the orientation of the magnets changes, the load will be released due to the absence of magnetic pull.
Permanent magnetic lifter is made up of two parts, such as permanent sucker and discharge device. The permanent sucker is made up of permanent magnet and magnet-conductive plate. The magnetic force wire generated by the permanent magnet will go through the magnet-conductive plate, attracted materials and form a closed circuit thus to achieve the purpose of lifting the steel materials.
Lifting Magnets realize quick, safe and easy way to lift ferrous materials and work pieces. These are two poles at the bottom of the lifter. Using high grade magnets, the lifter produces strong magnetic flux path through the two poles. Due to these, magnetic lifter are widely utilized for plant handling, lifting of machine tools and other such purposes. These work solely on the basis of their magnetic strength and do not require any electricity or battery power for functioning.
Our factory is one of the best Lifting Magnets manufacturers and suppliers in China. We have quality Lifting Magnets for sale. Welcome all the buyers around the world to contact with us.
Features An On/Off System
You can turn most lifting magnets on and off. Turning the handle to the ON position will activate the lifting magnet. The magnetic flux path will pass through the MS body. Conversely, turning the handle to the OFF position will detach the MS body. With a simple ON/OFF system, lifting magnets are easy to use.
Capable Of Lifting Thousands Of Pounds
Lifting magnets are very strong. They are not ordinary ceramic magnets. Instead, they are neodymium magnets, and like all neodymium magnets, they are very powerful. Some lifting magnets have a lifting rating of 660 pounds, while others have a lifting rating of 1,320 pounds, 6,600 pounds, or even 13,200 pounds. Regardless, lifting magnets are very strong and can lift most ferrous materials and workpieces.
Lightweight
Although lifting magnets are very strong, they are relatively light in weight. You don't need to use heavy machinery to transport them. In fact, lifting magnets do hold up cranes, hoists, and other machinery, but because of their light weight, you can usually move them manually. Some of them weigh a little over 6 pounds. Other lifting magnets weigh 20 to 100 pounds.
Corrosion Resistant
You don't have to worry about corrosion eating away at your lifting magnet. If you choose the right type, it will stay corrosion-resistant. For example, nickel-plated lifting magnets are naturally corrosion-resistant. Nickel is known for its excellent corrosion resistance. Some lifting magnets have a layer of nickel so they can withstand wet environments without being affected by corrosion.
Can Lift Cylindrical Objects
Lifting magnets can support objects of different shapes. You can even use them to lift cylindrical objects; Just keep two straight lines of contact between the cylindrical surface and the V-groove of the lifting magnet.
How To Manufacture Lifting Magnets?
Assemble The Magnetic Material
Assemble the magnet to the base according to the magnet's production documentation. For example, a permanent lifting magnet can be composed of two magnets each for the body and the rotor.
Machining and Painting
The magnetic chuck can be machined, including whether it has a ram stand. Then paint the assembled magnetic chuck.
Production Control and Install The Control Unit
The final product needs to go through production control to ensure it is flawless. The magnetic chuck usually comes with a control unit installed at the end of the manufacturing process.
Permanent Lifting Magnets
The magnetic force is switched on and off by a manual lever. Made of neodymium, iron and boron, the main feature of a permanent lifting magnet is that it does not need to be plugged in. This means that it can operate independently and does not require electricity, but the lifting capacity is limited (about 2 tons) because on more powerful permanent lifting magnets it is not possible to manually open/close the lever.
Battery-Powered Lifting Magnet
Activated and deactivated by a switch button—No manual operation is required when switching battery-powered magnets on and off. This means that such magnets are more powerful than permanent magnets (with a higher lifting capacity). Another benefit is that the lifted load is automatically demagnetized as soon as the magnet is switched off. The disadvantages of battery-powered lifting magnets are the higher price and the fact that the batteries need to be recharged.
Lifting Electromagnet
Also switched on and off by a switch button, but instead of being powered by batteries, it needs to be connected to a power source. Therefore, the lifting capacity can be very high—5 tons or even more.
Electropermanent Lifting Magnet
Electropermanent lifting magnets are somewhere between permanent magnets and electromagnets and are activated by an electrical pulse—They only need to be plugged in when activated. Once activated, the magnets no longer require electricity. The advantages of electropermanent lifting magnets are high lifting capacity and no cables getting in the way when the magnet is in use. The disadvantage is that the residual magnetism is high—The workpiece needs to be demagnetized after the magnet is no longer in use.
How To Choose Lifting Magnets?
Load Capacity
The maximum weight and dimensions of the objects you need to lift. Choose a magnet with a safe working load that exceeds the weight of your heaviest loads.
Object Shape
The shape and contact area of the objects you’re lifting. For example, long metal sheets may need to be lifted with a large magnetic system to prevent them from bending or sliding.
Magnet Types
Different lifting magnets use different types of magnets. Most use permanent magnets. For example, neodymium magnets are commonly used in lifting magnets. These rare earth magnets are able to produce extremely strong magnetic fields, so they are able to lift heavier objects than other types of magnets.
Lift Rating
When choosing a lifting magnet, you should consider its lift rating. The lift rating refers to the maximum weight that the lifting magnet is designed to lift. Some smaller lifting magnets have a lift rating of 200 to 400 pounds, while some larger lifting magnets have a lift rating of 6,000 to 13,000 pounds. Consider what you plan to use it for, and choose a lifting magnet with the appropriate lift rating.
Control Mechanism
Most lifting magnets offer some sort of control mechanism. They don’t produce a magnetic field all the time. Instead, they offer a control mechanism that allows you to turn the magnetic field on and off. When choosing a lifting magnet, you should consider its control mechanism. Many lifting magnets have a simple lever-based control mechanism. You pull this lever to turn the magnetic field on or off.
Operating Temperature
Another thing to consider when choosing a lifting magnet is the operating temperature. As the name implies, the operating temperature is the temperature at which the lifting magnets work. An operating temperature below 80 degrees means that the lifting magnets operate at temperatures below 80 degrees.
Materials
While all lifting magnets contain magnets (usually high-powered neodymium magnets), they are made of other materials. Some of them are made of stainless steel. They feature a stainless steel body with the magnets inside. Stainless steel lifting magnets are strong and durable, and have a long service life. And, with this iron alloy, they are naturally immune to rust and corrosion.
Surface Condition
To achieve the maximum rated lifting capacity, the load surface must be flat, clean, and the entire bottom of the magnetic lifter in contact. Magnetic forces are extremely sensitive to air gaps, as air is a magnetic insulator and magnetic lines of force will not pass through it. In the case of lifting ferrite loads, any dirt, paint, surface irregularities, rust, or oil will cause air gaps, or an insulator as effective as air, resulting in reduced lifting capacity. With air gaps as small as 0.80 mm, only 50% of the rated lifting capacity is achieved (assuming all other conditions are optimal).
Thickness Of Flat Loads
The thicker the load, the more magnetic lines of force can pass through it; conversely, the thinner the load, the fewer magnetic lines of force pass through the metal, resulting in reduced lifting capacity. For each permanent magnetic lifter, you will find two different values for the minimum thickness of the load. One value is the minimum thickness to achieve the stated rated lifting capacity, and the other is the minimum thickness required for the lifter to work, or in many cases, to be able to rotate its handle. If it is difficult to rotate the handle, the load is most likely too thin for this particular model and you should not apply any strong, sudden force as this could cause permanent damage to the device and/or personal injury.
How to Store Lifting Magnets
Location
Keep magnets in a dry, cool, well-sealed, and isolated area away from heat sources and direct sunlight. Avoid storing magnets in places that might experience extreme temperatures, as high heat can permanently demagnetize them.
Container
Store magnets in a secure container, such as a wooden or plastic box, to protect them from impact. You can also fill the space around the magnets with a sturdy material like foam or polystyrene to create distance between the magnet and the side of the box. For stronger magnets, you can surround them with sheet iron to create a magnetic short circuit that reduces their magnetic field.
Other Magnets
If you’re storing multiple magnets, try to keep them from mixing or storing them loosely. If you do store different magnets, keep them at a safe distance so their opposite poles aren't attracted. You can also store magnets with magnetic keepers, which are pieces of iron placed across the ends of the magnets to help prevent them from losing their magnetic properties over time.
How To Maintain Lifting Magnets?
Storage
Keep magnets in a dry, ventilated, and cool place that’s free of dust, flammable materials, and strong magnetic fields. Avoid storing magnets near the floor, where moisture can collect and corrode the iron in electromagnets.
Cleaning
Before using the magnet, clean the magnet’s face and the contact area on the load. You can use an air hose to remove debris. Also, remove any substances that the magnet might be affected by, such as nickel, cobalt, iron, and some rare-earth metal alloys.
Maintenance
Regularly check the magnetic poles to ensure they’re flat and undamaged. After use, you can apply oil to the pole surfaces to prevent rusting. You should also check the magnet’s electronic components, including buttons, indicators, terminals, and power cords. If the magnet suddenly stops working, it could be due to an electrical change in the building.
Operation
When using the magnet, avoid placing it in shear, and make sure the load is distributed correctly. Don’t lift loads over people or in areas where people are present, and keep a safe distance from the load.
Application of Lifting Magnets
Lifting magnets can be used for shipping and logistics, recycling, and prototype development. For example, they can be used to load and unload automotive parts and components onto trucks and shipping containers.
At construction sites and steel fabrication plants, these magnets are used to precisely lift and position large steel beams, columns, and plates.
At recycling facilities, permanent magnetic lifters are employed to lift and transport scrap metal, thereby increasing the efficiency of the recycling process.
Shipyards and heavy machinery industries utilize permanent lifting magnets to manipulate large components, such as engine blocks and ship hull sections.
Frequently Asked Questions
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